AFNetworking is a networking library for iOS and Mac OS X. It's built on top of the Foundation URL Loading System, extending the powerful high-level networking abstractions built into Cocoa. It has a modular architecture with well-designed, feature-rich APIs that are a joy to use.

Amazon Web Services SDK for iOS.

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BugSense for iOS.

CocoaPods is the dependency manager for Objective-C projects. It has thousands of libraries and can help you scale your projects elegantly.

The Core Bluetooth framework provides the classes needed for your iOS and Mac apps to communicate with devices that are equipped with Bluetooth low energy wireless technology.

The Core Location framework lets you determine the current location or heading associated with a device. The framework uses the available hardware to determine the user’s position and heading. You use the classes and protocols in this framework to configure and schedule the delivery of location and heading events. You can also use it to define geographic regions and monitor when the user crosses the boundaries of those regions. In iOS, you can also define a region around a Bluetooth beacon.

Spinning activity indicator with horizontal, bezel, or keyboard-covering styles and adjustable text. Often used when there would otherwise be a blank view while the application is loading data.

The iOS SDK provides Facebook Platform support for iOS apps.

Feed.fm allows you to legally add popular music to your mobile app with a Pandora-style user interface. This SDK takes care of all communication with the Feed.fm service and delivery of music files to the iOS device - you need only set authentication tokens and call play, pause, skip, like or dislike on the shared player instance.

Flurry SDK for analytics tracking and reporting. FlurryAds SDK also included.